knowns-dev Knowns up to 0.33.0 test server-side request forgery

Summaryinfo

A vulnerability categorized as critical has been discovered in knowns-dev Knowns up to 0.33.0. This impacts an unknown function of the file /api/embedding-models/test. Executing a manipulation can lead to server-side request forgery. The identification of this vulnerability is CVE-2026-86539. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability has been found in knowns-dev Knowns up to 0.33.0 and classified as critical. This vulnerability affects an unknown functionality of the file /api/embedding-models/test. The manipulation with an unknown input leads to a server-side request forgery vulnerability. The CWE definition for the vulnerability is CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

knowns through 0.33.0 contains a server-side request forgery vulnerability in the POST /api/embedding-models/test endpoint that issues outbound requests to caller-supplied destinations without validation. Attackers can enumerate internal hosts and cloud metadata endpoints by observing transport error messages that reveal network reachability information.

The advisory is available at github.com. This vulnerability was named CVE-2026-86539 since 09/08/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 09/08/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• knowns-dev

Name

• Knowns

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7
• 0.8
• 0.9
• 0.10
• 0.11
• 0.12
• 0.13
• 0.14
• 0.15
• 0.16
• 0.17
• 0.18
• 0.19
• 0.20
• 0.21
• 0.22
• 0.23
• 0.24
• 0.25
• 0.26
• 0.27
• 0.28
• 0.29
• 0.30
• 0.31
• 0.32
• 0.33.0

Website

• Product: https://github.com/knowns-dev/knowns/

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